11403990 has 144 divisors (see below), whose sum is σ = 34948368. Its totient is φ = 2659392.

The previous prime is 11403967. The next prime is 11404007. The reversal of 11403990 is 9930411.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 600201 + ... + 600219.

It is an arithmetic number, because the mean of its divisors is an integer number (242697).

Almost surely, 2^11403990 is an apocalyptic number.

11403990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 11403990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17474184).

11403990 is an abundant number, since it is smaller than the sum of its proper divisors (23544378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11403990 is a wasteful number, since it uses less digits than its factorization.

11403990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73 (or 42 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 27.

The square root of 11403990 is about 3376.9794195405. The cubic root of 11403990 is about 225.0879656046.

The spelling of 11403990 in words is "eleven million, four hundred three thousand, nine hundred ninety".